Migrating On-Premises Shares to Azure with Bandwidth Management

The scenario involves migrating massive volumes of data (20 TB per share) from on-premises network shares to Azure, with a specific requirement for bandwidth management during repeated transfers. This is a classic hybrid data migration challenge where network constraints are critical.

Azure Storage Mover is the primary service designed for this use case. It provides a centralized dashboard to plan, manage, and monitor migrations from on-premises file shares and servers to Azure Blob storage or Azure Files. Crucially, it uses AzCopy under the hood but adds a layer of orchestration that includes bandwidth throttling controls. This directly satisfies the "bandwidth management" requirement by allowing administrators to limit transfer rates to avoid saturating the corporate network link.

AzCopy is the command-line utility that performs the actual data movement. While Azure Storage Mover orchestrates the process, AzCopy is the engine that handles the high-speed data transfer and supports features like resuming interrupted transfers and managing bandwidth limits via flags such as --max-block-size and concurrency settings. Including AzCopy in the recommendation acknowledges the underlying technology being managed. In many Microsoft certification contexts, when asking for the services involved in a migration that requires manual or scriptable bandwidth control, both the orchestrator (Storage Mover) and the tool (AzCopy) are cited.

Other options are incorrect: Azure Data Box is for offline physical transfer, which doesn't fit the "repeated transfers" online sync model implied here. Azure Data Factory is primarily for ETL and data integration pipelines, not bulk file share migration with native bandwidth throttling for simple copy operations. Azure Storage Explorer is a GUI client for interacting with storage accounts, not an automated migration service.